缺磷对不同基因型玉米苗期生长及氮磷钾吸收的影响  

Effects of P deficiency on the plant growth and uptake of N,P and K in different maize cultivars at the seedling stage

作　　者：彭正萍[1] 孙旭霞[2] 刘会玲[1] 王艳群[1] 白晓松[1] 

机构地区：[1]河北农业大学资环学院,河北保定071001 [2]廊坊职业技术学院,河北廊坊102800

出　　处：《河北农业大学学报》2009年第6期8-13,共6页Journal of Hebei Agricultural University

基　　金：河北省自然科学基金(C2007000525);国家粮丰工程河北省课题(2006BAD02A08);国家973计划(2007CB109302)

摘　　要：采用营养液培养方法,研究了缺磷对9个玉米品种苗期的生长发育、根系形态、根系活性、氮磷钾吸收和转运率的影响。结果表明:缺磷减少玉米的叶片数、株高、根系活跃吸收面积、植株干重、氮磷钾吸收量和磷钾转运率,增加玉米的总根长、根表面积、根体积、总吸收面积和根冠比。品种间比较,缺磷条件下以‘蠡玉16’的干重最多,相对生物量最高为95.6%,原因是该品种有较大的根系表面积、活跃吸收面积、氮磷钾吸收量、氮磷转运率和磷钾根效比。Plant growth,root morphology and activity,uptake of N,P and K,and nutrients＇ transport efficiency of nine maize cultivars at the seedling stage were studied under the hydroponics and P deficiency conditions.The results showed that P deficiency decreased leaf numbers and height of plant,active uptake area of root,dry weight of plant,uptake of N,P and K,and three nutrients＇ transport efficiency.However,the root length,surface area,volume and total uptake area,and the ratio of root to shoot were all increased.Among nine maize cultivars and P deficiency treatments,the dry weight of liyu16 was the best and its relative biomass was the highest of 95.6% because it had larger root surface area,stronger root active uptake area,more uptake of N,P and K,higher transport efficiency of N and P,and root efficiency ratio of P and K.

关 键 词：缺磷 根系形态 根系活性 氮磷钾吸收 

分 类 号：S154.2[农业科学—土壤学] S143.6[农业科学—农业基础科学]